Optical trapping of particles at the air/water interface for studies in
... An optical tweezer is an instrument that uses a tightly focused laser beam to provide an intensity gradient to physically hold and move microscopic dielectric objects. Optical tweezers are invaluable tools to study a wide variety of systems [1]. When a microsphere is attached to a structure of large ...
... An optical tweezer is an instrument that uses a tightly focused laser beam to provide an intensity gradient to physically hold and move microscopic dielectric objects. Optical tweezers are invaluable tools to study a wide variety of systems [1]. When a microsphere is attached to a structure of large ...
Medical Imaging Group Research Contributions/Areas
... deployable in real-time and computationally efficient. These efforts have led to 28 high impact international journal publications over the past seven years, where all of them have appeared in reputed journals in the area of biomedical optics. These can be found at: http://cds.iisc.ac.in/faculty/pha ...
... deployable in real-time and computationally efficient. These efforts have led to 28 high impact international journal publications over the past seven years, where all of them have appeared in reputed journals in the area of biomedical optics. These can be found at: http://cds.iisc.ac.in/faculty/pha ...
Research Express@NCKU Form (English example) Item Content
... localized optical enhancement effect in SERS process. It has been shown that a metal nanoparticle possesses the ability to support the localized surface plasmon resonance (LSPR), which can be understood as a coherent electron oscillation of the nanoparticle in response to an incident optical field [ ...
... localized optical enhancement effect in SERS process. It has been shown that a metal nanoparticle possesses the ability to support the localized surface plasmon resonance (LSPR), which can be understood as a coherent electron oscillation of the nanoparticle in response to an incident optical field [ ...
Optical Networks
... Optical Components: Couplers, Isolators & Circulators, Multiplexers & Filters (Grating, Fiber Bragg Grating, Fabry-Perot Filters, Dielectric filters, Acousto-optic filter, etc.), Some Optical Amplifiers (Erbium-Doped Fiber Amplifiers, Raman Amplifiers, Semiconductor Optical Amplifiers), Switches (La ...
... Optical Components: Couplers, Isolators & Circulators, Multiplexers & Filters (Grating, Fiber Bragg Grating, Fabry-Perot Filters, Dielectric filters, Acousto-optic filter, etc.), Some Optical Amplifiers (Erbium-Doped Fiber Amplifiers, Raman Amplifiers, Semiconductor Optical Amplifiers), Switches (La ...
1 Introduction 2 Theory of Optical Trapping
... 2 Theory of Optical Trapping 2.1 Simple explanation of optical trapping A basic and intuitive explanation of optical trapping can be given by a ray description. Consider a transparent bead (whose index of refraction is larger than that of surrounding medium), placed in an intensity gradient (Figure ...
... 2 Theory of Optical Trapping 2.1 Simple explanation of optical trapping A basic and intuitive explanation of optical trapping can be given by a ray description. Consider a transparent bead (whose index of refraction is larger than that of surrounding medium), placed in an intensity gradient (Figure ...
Course code: EE412 Course title: Optical
... and also about detectors and its performance factors. To learn the fiber optical receivers, noise performance in photo detector, receiver operation and configuration. The various characteristics of signal propagation inside the fiber and its basic geometric parameters measurement techniques are also ...
... and also about detectors and its performance factors. To learn the fiber optical receivers, noise performance in photo detector, receiver operation and configuration. The various characteristics of signal propagation inside the fiber and its basic geometric parameters measurement techniques are also ...
Equipment list: Description Supplier Model Optical test bench
... instrument can perfectly align each optical component’s center-of-curvature and position on its on-axis focused beam, exactly to specifications. The PSM is also used for aligning aspheric optics, including off-axis aspheres. The PSM locates point images and shows the image shape as a star test. The ...
... instrument can perfectly align each optical component’s center-of-curvature and position on its on-axis focused beam, exactly to specifications. The PSM is also used for aligning aspheric optics, including off-axis aspheres. The PSM locates point images and shows the image shape as a star test. The ...
Final Exam
... 3) A He-Cd laser (442 nm) is incident on a screen containing two very narrow horizontal slits separated by 180 µm. A fringe pattern appears on a screen held 1.2 m away. a) What is the distance from the central axis to the first zero of the light intensity? b) How far in mm from the central axis is t ...
... 3) A He-Cd laser (442 nm) is incident on a screen containing two very narrow horizontal slits separated by 180 µm. A fringe pattern appears on a screen held 1.2 m away. a) What is the distance from the central axis to the first zero of the light intensity? b) How far in mm from the central axis is t ...
Linear momentum increase and negative optical forces
... acting against the flow of light arise naturally due to the appropriate amplification of the photon linear momentum when light is scattered from one dielectric medium into another with higher refractive index. This situation opens up a number of intriguing prospects for optical forces and their effect ...
... acting against the flow of light arise naturally due to the appropriate amplification of the photon linear momentum when light is scattered from one dielectric medium into another with higher refractive index. This situation opens up a number of intriguing prospects for optical forces and their effect ...
- vjs.ac.vn
... For simplicity, we assume that the radius (a) of the particle is much smaller than the wavelength of the laser (i.e., a ), in this case we can treat the dielectric particle as a point dipole. We also assume that the refractive index of the dielectric particle is n1 and n1 n2 . This is the ne ...
... For simplicity, we assume that the radius (a) of the particle is much smaller than the wavelength of the laser (i.e., a ), in this case we can treat the dielectric particle as a point dipole. We also assume that the refractive index of the dielectric particle is n1 and n1 n2 . This is the ne ...
Simplified description of optical forces acting on a nanoparticle in
... refractive indices close to unity and compare them with the numerical results obtained by generalized Lorenz– Mie theory (GLMT). We show that the axial optical force depends periodically on the particle size and that the equilibrium position of the particle alternates between the standing-wave antin ...
... refractive indices close to unity and compare them with the numerical results obtained by generalized Lorenz– Mie theory (GLMT). We show that the axial optical force depends periodically on the particle size and that the equilibrium position of the particle alternates between the standing-wave antin ...
Optical Properties of Condensed Matters
... Semiclassical: apply quantum mechanics to atoms, treat light as a classical electromagnetic wave; Fully quantum: both atoms and light are treated quantum mechanically. ...
... Semiclassical: apply quantum mechanics to atoms, treat light as a classical electromagnetic wave; Fully quantum: both atoms and light are treated quantum mechanically. ...
Advantages of Holographic Optical Tweezers
... Stimulated by the work in the area of cooling atoms the first schemes of using light for trapping microscopic particles were used in the 1970s?, ? . In most of these experiments two laser beams were used to accomplish a stable trap. In 1986 Ashkin et al.? realized a single beam gradient force optica ...
... Stimulated by the work in the area of cooling atoms the first schemes of using light for trapping microscopic particles were used in the 1970s?, ? . In most of these experiments two laser beams were used to accomplish a stable trap. In 1986 Ashkin et al.? realized a single beam gradient force optica ...
Calibration of Optical Tweezers
... The position of this lens allows us to focus the laser beam. The light is then reflected off a dichroic mirror and passed through a microscope (100X, NA=1.3). The focused beam is projected onto a microscope slide that contains silica microspheres in deionized water. A white light source is used to i ...
... The position of this lens allows us to focus the laser beam. The light is then reflected off a dichroic mirror and passed through a microscope (100X, NA=1.3). The focused beam is projected onto a microscope slide that contains silica microspheres in deionized water. A white light source is used to i ...
1 - Capanina
... The robustness of optical and radio frequency wireless communication in various channel conditions is very different. The propagation of light through any medium is highly wavelength dependant and, in practice, only atmospheric “absorption windows” where attenuation due to absorption by atmospheric ...
... The robustness of optical and radio frequency wireless communication in various channel conditions is very different. The propagation of light through any medium is highly wavelength dependant and, in practice, only atmospheric “absorption windows” where attenuation due to absorption by atmospheric ...
Week7-animations
... fusion energy. Pellets of hydrogen of fused using intense laser pulses. July 5th, 2012: 192 laser beams delivered 1.85MJ and 500 trillion watts of power (short time period). 1000 times more power than used by US at any instant of time. ...
... fusion energy. Pellets of hydrogen of fused using intense laser pulses. July 5th, 2012: 192 laser beams delivered 1.85MJ and 500 trillion watts of power (short time period). 1000 times more power than used by US at any instant of time. ...
Optical tweezers
Optical tweezers (originally called ""single-beam gradient force trap"") are scientific instruments that use a highly focused laser beam to provide an attractive or repulsive force (typically on the order of piconewtons), depending on the refractive index mismatch to physically hold and move microscopic dielectric objects similar to tweezers. Optical tweezers have been particularly successful in studying a variety of biological systems in recent years.